Harald Hoyer
a8ecc2cfa1
Introduce a NixOS module for sending service status emails on failures via systemd. The module provides configurable options for email recipients and integrates with the `sendmail` utility to notify admins about service issues.
74 lines
1.6 KiB
Nix
74 lines
1.6 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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with lib;
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let
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checkConditions = pkgs.writeScript "checkConditions" ''
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#!/bin/sh
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STATUS=$(systemctl status --full "$1")
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case "$STATUS" in
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*"activating (auto-restart) (Result: timeout)"*) exit 1 ;;
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*) exit 0 ;;
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esac
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'';
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sendmail = pkgs.writeScript "sendmail" ''
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#!/bin/sh
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${pkgs.system-sendmail}/bin/sendmail -t <<ERRMAIL
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To: $1
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From: ${config.systemd.email-notify.mailFrom}
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Subject: Status of service $2
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Content-Transfer-Encoding: 8bit
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Content-Type: text/plain; charset=UTF-8
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$(systemctl status --full "$2")
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ERRMAIL
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'';
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in
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{
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options = {
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systemd.email-notify.mailTo = mkOption {
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type = types.str;
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default = "admin";
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description = "Email address to which the service status will be mailed.";
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};
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systemd.email-notify.mailFrom = mkOption {
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type = types.str;
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default = "admin";
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description = "Email address from which the service status will be mailed.";
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};
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systemd.services = mkOption {
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type =
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with types;
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attrsOf (submodule {
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config.onFailure = [ "email@%n.service" ];
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});
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};
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};
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config = {
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systemd.services."email@" = {
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description = "Sends a status mail via sendmail on service failures.";
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onFailure = mkForce [ ];
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unitConfig = {
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StartLimitIntervalSec = "5m";
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StartLimitBurst = 1;
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};
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serviceConfig = {
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ExecCondition = "${checkConditions} %i";
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ExecStart = "${sendmail} ${config.systemd.email-notify.mailTo} %i";
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Type = "oneshot";
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};
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};
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};
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}
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